With this service, Nimbuzz enters a market already dominated by established mobile VoIP clients Fring and TruPhone. Fring, like Nimbuzz, incorporates IM capability with multiple IM networks and VoIP calls. TruPhone allows you to make VoIP calls to TruPhone users and traditional phones, without the IM features of Fring and Nimbuzz.

To load Nimbuzz, download their client from their mobile web site, create an account and sign in. Signing in to additional networks such as Google or Skype is as easy as entering your username and password for those respective services.

Nimbuzz is very responsive and easy to use, featuring a great native Symbian user interface. A VoIP call originating from my Nokia E90 to a friend of mine on MSN over a Wi-Fi connection sounded good and I managed to conduct a decent 3 minute call with acceptable VOIP voice quality.

Outside of their mobile offerings, the company has a Windows desktop application for conferring with your Nimbuzz contacts and social widgets that can be embedded onto your Facebook, Orkut and MySpace pages. By clicking on your Numbuzz widget, friends can call/chat you for free, leave you a voice message, send you a text message, and share photos, music, and videos with you. Just a word of caution, please make sure you have subscribed an unlimited data plan on your mobile device before using Nimbuzz on your mobile as it does suck down huge amount of bandwidth.